Remove type-conversion compiler warnings, no functional change.

$OpenBSD: patch-CUnit_Sources_Framework_TestRun_c,v 1.1 2011/08/19 08:04:02 jasper Exp $
--- CUnit/Sources/Framework/TestRun.c.orig	Wed Aug 17 20:25:25 2011
+++ CUnit/Sources/Framework/TestRun.c	Wed Aug 17 20:24:22 2011
@@ -559,7 +559,7 @@ CU_EXPORT char * CU_get_run_results_string(void)
 {
   CU_pRunSummary pRunSummary = &f_run_summary;
   CU_pTestRegistry pRegistry = CU_get_registry();
-  size_t width[9];
+  int width[9];
   size_t len;
   char *result;
 
